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                [Poi2011]Plot                </h1>
                <p>时间限制：300s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  空间限制：128MB</p>			</div>
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                                <h3>题目描述</h3><p><p>给出一系列点p_1, p_2, ... , p_n，将其分成不多余m个连续的段，第i段内求一个点q_i，使得q_i到这段内点的距离的最大值的最大值最小</p>
<p></p></p><hr/><h3>输入格式</h3><p><p>第一行，n m<br />
下面n行，每行两个整数，表示p_i的x y坐标<br />
1&lt;=m&lt;=n&lt;=100000<br />
坐标范围[-1000000,1000000]&nbsp;<span style="font-family: arial, verdana, helvetica, sans-serif;">0&lt;p,q,r&lt;=150，输入中至少包含一个&rsquo;N&rsquo;</span></p>
<p></p></p><hr/><h3>输出格式</h3><p><p><span style="font-size: medium">第一行，q_i到这段内点的距离的最大值的最大值的最小值<br />
第二行，分成的段数k<br />
下面k行，每行两个实数，表示q_k的x y坐标</span></p>
<p><span style="font-size: medium"><br />
All the real numbers should be printed with at most 15 digits after the decimal point. <br />
</span></p></p><hr/><h3>样例输入</h3><pre>7 2
2 0
0 4
4 4
4 2
8 2
11 3
14 2

</pre><hr/><h3>样例输出</h3><pre>3.00000000
2
2.00000000 1.76393202
11.00000000 1.99998199
</pre><hr/><h3>提示</h3><p><p><a href="http://61.187.179.132/JudgeOnline/userinfo.php?user=wyx528">wyx528</a>提供SPJ</p></p><hr/><h3>题目来源</h3><p>没有写明来源</p>
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